Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2014

Fair Value Disclosures [Abstract]

Schedule of Financial Assets and Financial Liabilities Measured at Fair Value on a Recurring Basis

Financial assets and financial liabilities measured at fair value on a recurring basis are as follows:

			Fair Value Measurements at Reporting Date Using
As of June 30, 2014	Balance		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Investment securities available-for-sale:
Obligations of U.S. government agencies	$	718,567	$	—	$	718,567	$	—
U.S. agencies mortgage-backed securities & collateralized mortgage obligations	788,064			—	788,064			—
Private mortgage-backed securities	365			—	365			—
Mortgage servicing rights	25,812			—	25,812			—

			Fair Value Measurements at Reporting Date Using
As of December 31, 2013	Balance		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Investment securities available-for-sale:
Obligations of U.S. government agencies	$	763,238	$	—	$	763,238	$	—
U.S. agencies mortgage-backed securities & collateralized mortgage obligations	1,184,053			—	1,184,053			—
Private mortgage-backed securities	415			—	415			—
Mortgage servicing rights	25,698			—	25,698			—

Schedule of Financial Assets and Financial Liabilities Measured at Fair Value on a Non-Recurring Basis

The following table presents information about the Company’s assets and liabilities measured at fair value on a non-recurring basis.

				Fair Value Measurements at Reporting Date Using
As of June 30, 2014	Balance		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Impaired loans	$	46,505	$	—	$	—	$	46,505
Other real estate owned	6,895			—		—	6,895
Long-lived assets to be disposed of by sale	1,186			—		—	1,186
				Fair Value Measurements at Reporting Date Using
As of December 31, 2013	Balance		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Impaired loans	$	57,302	$	—	$	—	$	57,302
Other real estate owned	8,502			—		—	8,502
Long-lived assets to be disposed of by sale	1,186			—		—	1,186

Schedule of Estimated Fair Values of Financial Instruments by Level of Valuation Inputs

The estimated fair values of financial instruments that are reported in the Company's consolidated balance sheets, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value, are as follows:

					Fair Value Measurements at Reporting Date Using
As of June 30, 2014	Carrying Amount		Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Financial assets:
Cash and cash equivalents	$	503,648	$	503,648	$	—	$	503,648	$	—
Investment securities available-for-sale	1,506,996		1,506,996		—		1,506,996		—
Investment securities held-to-maturity	586,989		592,682		—		592,682		—
Accrued interest receivable	26,497		26,497		—		26,497		—
Mortgage servicing rights, net	13,443		25,812		—		25,812		—
Net loans	4,428,096		4,389,772		—		4,343,267		46,505
Total financial assets	$	7,065,669	$	7,045,407	$	—	$	6,998,902	$	46,505
Financial liabilities:
Total deposits, excluding time deposits	$	5,043,387	$	5,043,387	$	—	$	5,043,387	$	—
Time deposits	1,135,655		1,141,585		—		1,141,585		—
Securities sold under repurchase agreements	462,985		462,985		—		462,985		—
Other borrowed funds	20		20		—		20		—
Accrued interest payable	5,316		5,316		—		5,316		—
Long-term debt	36,893		35,381		—		35,381		—
Subordinated debentures held by subsidiary    trusts	82,477		75,200		—		75,200		—
Total financial liabilities	$	6,766,733	$	6,763,874	$	—	$	6,763,874	$	—

					Fair Value Measurements at Reporting Date Using
As of December 31, 2013	Carrying Amount		Estimated Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Financial assets:
Cash and cash equivalents	$	534,827	$	534,827	$	—	$	534,827	$	—
Investment securities available-for-sale	1,947,706		1,947,706		—		1,947,706		—
Investment securities held-to-maturity	203,837		205,926		—		205,926		—
Accrued interest receivable	26,450		26,450		—		26,450		—
Mortgage servicing rights, net	13,546		25,698		—		25,698		—
Net loans	4,259,514		4,246,539		—		4,189,237		57,302
Total financial assets	$	6,985,880	$	6,987,146	$	—	$	6,929,844	$	57,302
Financial liabilities:
Total deposits, excluding time deposits	$	4,943,033	$	4,943,033	$	—	$	4,943,033	$	—
Time deposits	1,190,717		1,196,250		—		1,196,250		—
Securities sold under repurchase agreements	457,437		457,437		—		457,437		—
Other borrowed funds	3		3		—		3		—
Accrued interest payable	4,963		4,963		—		4,963		—
Long-term debt	36,917		34,508		—		34,508		—
Subordinated debentures held by subsidiary    trusts	82,477		72,045		—		72,045		—
Total financial liabilities	$	6,715,547	$	6,708,239	$	—	$	6,708,239	$	—